From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Summary of main service complaints for Bentley rear axles, listing failure types and corresponding mileages.
| Identifier | ExFiles\Box 107\2\ scan0224 | |
| Date | 15th October 1937 | |
| To Sg.{Arthur F. Sidgreaves - MD} from Rm{William Robotham - Chief Engineer}/GWH.{George W. Hancock - Head Chateauroux} c. Hs.{Lord Ernest Hives - Chair} c. By.{R.W. Bailey - Chief Engineer} c. Rm.{William Robotham - Chief Engineer} c. Mx.{John H Maddocks - Chief Proving Officer} Rm{William Robotham - Chief Engineer}/GWH.{George W. Hancock - Head Chateauroux}6/MH.{M. Huckerby}15.10.37. BENTLEY MAIN SERVICE COMPLAINTS. Rear Axle comprising the following :- (1) Fractured Road Shafts 1 - 4 1/4 litre at 14,775 miles. 3 - 3 1/2 litre " 53,463 miles. 40,197 " 54,382 " (2) Fractured Driving Dogs 2 - 4 1/4 litre 4,160 " 19,991 " 1 - 3 1/2 litre 18,934 " (3) Driving Dogs slack causing rattle 39 - 4 1/4 litre at 1,383 " 3,114 " 3,000 " 1,850 " 4,475 " 3,341 " 4,963 " 2,389 " 2,729 " 2,444 " remaining vary from 8,000 to 29,000 " 24 - 3 1/2 litre average 25,000 " (4) Noisy Axles. 15 - 4 1/4 litre Thrust race with incorrect pinch made quiet after correcting. 8 at 2,704 " 4,242 " 2,078 " 8,796 " 13,000 " 13,205 " 13,177 " 29,281 " | ||